It is always a good idea to carry around at least one Airtight Flask, as it is always possible to randomly find a Giant Rank Fish, Sour Ambrosial Meat or a Golden Egg which spoils quickly and must be stored immediately to permanently preserve their extraordinary curative effects.

A Golden Egg will quickly rot within one (in-game) day, spoiling into a Rotten Egg.

Unlike other rotten consumables which can be salvaged with Airtight Flask and then Spring Water, Golden Eggs are always irredeemably lost after they rot. Using this procedure in this case will result in a regular Kept Egg.